Hello Friends,

Some time we need some functionality before execution of our controller function or after execution of controller. For example you need to check a user is login or not before execution of any controller. Codeigniter hook is a very good functionality to solve this kind of problem, it save time to writing code multiple time. Lets have a below example for pre hook as below::

1) Open "Config.php" and change the statement

$config['enable_hooks'] = FALSE;
// Change this statement to true
$config['enable_hooks'] = TRUE;

2) Now I have created a Controller "Codeigniter/application/controllers/Hello.php" with below code::

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Hello extends CI_Controller {
	function index(){
		echo "My name is Vivek";
	}

}

?>

 **** When I run this code on browser it will display "My name is Vivek"

3) Now I have created a file "application/hooks/Hookcall.php" and save this on below path ::

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Hookcall extends CI_Controller {
	public function temp(){
		echo "Good Morning, Everyone";
	}
}
?>

4) Now I open do open "Codeigniter/application/config/hooks.php" and paste code shown below::

$hook['pre_controller'] = array(
                                'class'    => 'Hookcall',
                                'function' => 'temp',
                                'filename' => 'Hookcall.php',
                                'filepath' => 'hooks'
                                );

5) Now see the magic when you run "http://localhost/codelgniter/hello" Now it will display

*** "Good Morning, Everyone My name is Vivek"